99779328 has 216 divisors, whose sum is σ = 326516736. Its totient is φ = 29030400.

The previous prime is 99779321. The next prime is 99779369. The reversal of 99779328 is 82397799.

It is a super-2 number, since 2×99779328² = 19911828592263168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99779321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 785601 + ... + 785727.

Almost surely, 2^99779328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99779328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163258368).

99779328 is an abundant number, since it is smaller than the sum of its proper divisors (226737408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99779328 is a wasteful number, since it uses less digits than its factorization.

99779328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 174 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 99779328 is about 9988.9603062581. The cubic root of 99779328 is about 463.8172090143.

The spelling of 99779328 in words is "ninety-nine million, seven hundred seventy-nine thousand, three hundred twenty-eight".